Grandfield; John E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Grandfield; John E..The latest application filed is for "low-profile loop antenna".
- Grandfield; John E. - Bourne MA
- Grandfield; John E. - Plymouth MA
- Grandfield; John E. - St. Petersburg FL
- Grandfield; John E. - Bristol RI
- Grandfield; John E. - W. Yarmouth MA
| Patent | Date |
|---|---|
| Switchable active balanced-to-unbalanced phase shifter Grant 10,819,321 - Zaiden , et al. October 27, 2 | 2020-10-27 |
| Frequency selective surface antenna element Grant 10,490,897 - Grandfield , et al. Nov | 2019-11-26 |
| Electronically steerable single helix/spiral antenna Grant 9,899,746 - Grandfield , et al. February 20, 2 | 2018-02-20 |
| Low-profile loop antenna Grant 9,748,642 - Grandfield August 29, 2 | 2017-08-29 |
| Low-Profile Loop Antenna App 20160181697 - Grandfield; John E. | 2016-06-23 |
| Ground plane meandering in Z direction for spiral antenna Grant 9,337,533 - Grandfield , et al. May 10, 2 | 2016-05-10 |
| Ground Plane Meandering in Z Direction for Spiral Antenna App 20160043464 - Grandfield; John E. ; et al. | 2016-02-11 |
| Electronically Steerable Single Helix/spiral Antenna App 20150171517 - Grandfield; John E. ; et al. | 2015-06-18 |
| Periodic spiral antennas Grant 8,922,452 - O'Brien , et al. December 30, 2 | 2014-12-30 |
| Dual band electrically small tunable antenna Grant 8,629,811 - Grandfield , et al. January 14, 2 | 2014-01-14 |
| Dual Band Electrically Small Tunable Antenna App 20130069838 - Grandfield; John E. ; et al. | 2013-03-21 |
| Multiple channel radio frequency repeater Grant 5,802,452 - Grandfield , et al. September 1, 1 | 1998-09-01 |
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